113431154021 has 4 divisors (see below), whose sum is σ = 113905761600. Its totient is φ = 112956546444.

The previous prime is 113431154017. The next prime is 113431154029. The reversal of 113431154021 is 120451134311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120451134311 = 258677 ⋅465643.

It is a cyclic number.

It is not a de Polignac number, because 113431154021 - 2² = 113431154017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113431154029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237303431 + ... + 237303908.

It is an arithmetic number, because the mean of its divisors is an integer number (28476440400).

Almost surely, 2^113431154021 is an apocalyptic number.

It is an amenable number.

113431154021 is a deficient number, since it is larger than the sum of its proper divisors (474607579).

113431154021 is an equidigital number, since it uses as much as digits as its factorization.

113431154021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474607578.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 113431154021 its reverse (120451134311), we get a palindrome (233882288332).

The spelling of 113431154021 in words is "one hundred thirteen billion, four hundred thirty-one million, one hundred fifty-four thousand, twenty-one".